Ion size and activity at acetylcholine receptors.
D000818:Animals; D001665:Binding Sites; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D007477:Ions; D009132:Muscles / Q000187:drug effects; D009994:Osmolar Concentration; D011726:Pyridinium Compounds / Q000494:pharmacology; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology*; D011894:Rana pipiens; D011950:Receptors, Cholinergic; D011955:Receptors, Drug; D013329:Structure-Activity Relationship
D007477:Ions; D011726:Pyridinium Compounds; D000644:Quaternary Ammonium Compounds; D011950:Receptors, Cholinergic; D011955:Receptors, Drug